Influence of the Chain Extender Nature on Adhesives Properties of Polyurethane Dispersions
| Autor: | Ana M. Torró-Palau, Francisca Arán-Aís, César Orgilés-Barceló, Elena Orgilés-Calpena |
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| Rok vydání: | 2012 |
| Předmět: |
chemistry.chemical_classification
Materials science Polymers and Plastics Extender Polymer Dynamic mechanical analysis Surfaces Coatings and Films law.invention chemistry.chemical_compound Differential scanning calorimetry chemistry Chemical engineering Natural rubber law visual_art Polymer chemistry visual_art.visual_art_medium Adhesive Physical and Theoretical Chemistry Prepolymer Polyurethane |
| Zdroj: | Journal of Dispersion Science and Technology. 33:147-154 |
| ISSN: | 1532-2351 0193-2691 |
| DOI: | 10.1080/01932691.2010.548250 |
| Popis: | Several waterborne polyurethane adhesives containing different chain extenders were prepared by using the acetone process. Concretely, the polyurethane dispersions were synthesized by the prepolymer method based on three chain extenders: two diols and one diamine: 1,4-butanediol, 1,6-hexanediol and hydrazine. The adhesive solutions were characterized by flow rheology, pH measurements, particle size, and solids content. The solid adhesive films were characterized by plate-plate rheology, dynamic mechanical analysis (DMA) and differential scanning calorimetry (DSC). The adhesion properties were measured from T-peel test of leather/polyurethane adhesive/SBR rubber joints. As a result, the chosen chain extender influences significantly the polyurethane synthesized properties, especially determines the crystallinity of the polymer, as well as thermal and adhesive properties. Particularly, the molecular weight of the chain extender determines the structure of the synthesized polyurethanes. |
| Databáze: | OpenAIRE |
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